Bornean Families

Rhacophorus angulirostris

Masked Tree Frog

Rhacophorus angulirostris is a montane species. It lives along rocky mountain streams above 1,000 m. Coloration can be brown or green. The angular snout shape is characterstic. A white spot can be present in some populations.

It is unlikely to see this frog during daytime. At night they can be found perching 2-4 m above the ground in vegetation. We often saw several specimens in one spot but never in large numbers.

The tadpoles of this species grow up to 50 mm total length. They have a cup-like sucker mouth. Some dark blotches on the tail appear characteristic for this tadpole. Tadpoles live in clear, cool mountain streams where they can hold position by clasping with their mouth sucker to the rocks. They likely feed on algal and bacterial overgrowth on rocks.